As laborers for Jesus, we are all working to reap a harvest through the gospel.  We plant, we water, and we harvest.  However, we don’t always get to do all three things with the same person.  Sometimes we’re the one who plants the gospel in a person’s life.  At other times we’re the one who waters that gospel so that it might take root, grow, bloom, and bear fruit.  Still other times we are the one who gets to harvest that soul by leading them to faith in Jesus Christ.  Of course, it’s God who brings the growth and the harvest, but He uses human agents to bring it about (Matthew 9:37-38).  It’s a blessing to be part of all three phases with the same person, but I would guess that that’s actually fairly rare.